"Our relationship was terrible, and it went on for years."

We really don't need to read beyond the first sentence. It went on for years because you wanted it to. We're well read from similar countless letters to Savage Love to know that.

Get the locks changed.

Get the locks changed and congratulate yourself for getting out. It's harder than most people think and you should consider it proof that you are stronger than you used to be and have grown as a person. Remember that any time you start to doubt yourself.

@all Yep! How could someone write this without getting the sense that they need a mirror?

I sincerely hope you have re-keyed any lock that key opens and this is more an assertion of Independence than personal safety.